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TIL the reason flamingos stand on one leg is to preserve body heat (water can rapidly draw away heat). In hotter weather, they tend to stand on two legs.

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Z8a4R TIL: There is a fully intact Roman wine bottle sitting in Germany from the year 350 AD. It's fully drinkable but the Romans added a significant amount of thick olive oil as a preservative.
JYmkk TIL that the 4th of July and Halloween always fall on the same weekday. They are also 'Doomsday' days according to the Doomsday Rule, from which any weekday can be calculated easily.
Leb0 TIL there’s an optical illusion that can distort your vision for months, changing the way you perceive colour.
b99mp TIL that since 1405 until the present day without interruption, the city of Lausanne (Switzerland) has maintained a lookout in the Cathedral bell tower. The lookout announces the time by yelling the hour from 10 pm to 2 am, 365 days a year. The lookout cries the hour to each cardinal direction
6EjxW TIL that while Kool Aid usually gets used when referring to the Jonestown Massacre, (drink the Kool Aid) investigators actually found boxes of grape Flavor Aid, a generic version of the drink.